Time-multiplexing for advanced photonic quantum information processing
Abstract
Time-multiplexing for advanced photonic quantum information processingAbstract:Photons have proven to be excellent carriers of quantum information, and have beenemployed in numerous ground-breaking quantum information processing (QIP)protocols. However, all existing photonic QIP systems are severely limited in terms ofscalability, due to the inefficiency of available single- and multi-photon sources.Spontaneous parametric down-conversion (SPDC) has been widely used for creatingphoton pairs and multi-photon states, but the number of photon pairs produced israndom: One cannot obtain a photon pair on demand, and unfortunately, one cannotindefinitely increase the generation probability of a photon pair, without simultaneouslyincreasing the likelihood of unwanted multi-pair events. In this project, inorder to efficiently overcome the probabilistic nature of SPDC and to realize nearlydeterministic single- and multi-photon sources, we propose to employ advanced timemultiplexingtechniques, expanding on our previous efforts. We will first develop toolsto generate and manipulate various quantum states of light for efficient photonic QIP.Specifically, we will develop time-multiplexed single- and multi-photon sources, and aphotonic router which can efficiently distribute sequentially generated single photonsfrom a time-multiplexed source to different channels of a large-scale photonic circuit.With these resources in hand, we will then pursue a number of applications. Forexample, using a time-multiplexed efficient quantum memory as a photon synchronizer,we can enhance the key generation rate of measurement-device-independentquantum key distribution. Incorporating integrated photonic circuits will enableefficient implementation of various QIP protocols with larger number photonscompared to previous proof-of-principle demonstrations. These include enhancedquantum metrology, quantum walks, and boson sampling. With the latter, we hope toset the stage for the first demonstration of ~quantum supremacy~ over classicalinformation processing.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 05, 2017
- Source ID
- N000141712286
Entities
People
- Paul G. Kwiat
Organizations
- Office of Naval Research
- United States Navy
- University of Illinois Urbana–Champaign